<template>
  <view class="content">
    <!-- 1 导航栏 -->
    <Navbar></Navbar>
    <!-- scrolltolower这个是scroll-view 滚动到底部触发 分页加载 -->
    <!-- 
      1 开启下拉刷新 refresher-enabled
      2 下拉事件 refresherrefresh
      3 滚动条触底事件 scrolltolower
      4 运行上下滚动  scroll-y
      5 refresher-triggered 控制 下拉状态 显示和隐藏
     -->
    <scroll-view scroll-y class="main" @scrolltolower="scrolltolower" refresher-enabled
      @refresherrefresh="refresherrefresh" :refresher-triggered="refresherTriggered">
      <!-- 2 轮播图 -->
      <!-- 父传子 -->
      <Carousel :banners="banners" height="280rpx"></Carousel>
      <!-- 前台分类 -->
      <CateScroll :categorymutli="categorymutli"></CateScroll>
      <!-- 4 人气推荐 -->
      <view class="panel recommend">
        <view class="item" v-for="item in hotMutli" :key="item.id">
          <view class="title">
            {{ item.title }}<text>{{ item.alt }}</text>
          </view>
          <navigator hover-class="none" :url="`/pages/recommend/index?type=${item.type}`" class="cards">
            <image mode="aspectFit" v-for="img in item.pictures" :key="img" :src="img"></image>
          </navigator>
        </view>
      </view>
      <!-- 5 新鲜好物 -->
      <view class="panel fresh">
        <view class="title">
          新鲜好物
          <navigator hover-class="none" class="more" url="/pages/recommend/index?type=5">更多</navigator>
        </view>
        <view class="cards">
          <navigator hover-class="none" :url="`/pages/goods/index?id=${item.id}`" v-for="item in homeNew"
            :key="item.id">
            <image mode="aspectFit" :src="item.picture"></image>
            <view class="name">{{ item.name }}</view>
            <view class="price">
              <text class="small">¥</text>{{ item.price }}
            </view>
          </navigator>
        </view>
      </view>
      <!-- 6 热门品牌 写死静态 没有接口 -->
      <view class="panel brands">
        <view class="title">
          热门品牌
          <navigator hover-class="none" class="more" url="/pages/list/index">更多</navigator>
        </view>
        <view class="cards">
          <navigator hover-class="none" url="/pages/goods/index">
            <image mode="aspectFit" src="http://static.botue.com/erabbit/static/uploads/brand_logo_1.jpg"></image>
            <view class="name">小米</view>
            <view class="price">99元起</view>
          </navigator>
          <navigator hover-class="none" url="/pages/goods/index">
            <image mode="aspectFit" src="http://static.botue.com/erabbit/static/uploads/brand_logo_2.jpg"></image>
            <view class="name">TCL</view>
            <view class="price">199起</view>
          </navigator>
          <navigator hover-class="none" url="/pages/goods/index">
            <image mode="aspectFit" src="http://static.botue.com/erabbit/static/uploads/brand_logo_3.jpg"></image>
            <view class="name">饭小宝</view>
            <view class="price">9.9起</view>
          </navigator>
          <navigator hover-class="none" url="/pages/goods/index">
            <image mode="aspectFit" src="http://static.botue.com/erabbit/static/uploads/brand_logo_4.jpg"></image>
            <view class="name">鳄鱼</view>
            <view class="price">299起</view>
          </navigator>
        </view>
      </view>
      <!-- 7 猜你喜欢-->
      <Guess :goodsGuessLike="goodsGuessLike"></Guess>
    </scroll-view>
  </view>
</template>

<script>
import { mapState, mapMutations } from "vuex";

// 1 导入组件
import Navbar from "./components/Navbar.vue";

// 引入发送请求的函数
import {
  getHomeBanner, getHomeCategoryMutli,
  getHomeHotMutli, getHomeNew,
  getHomeGoodsGuessLike
} from "@/api/home";
export default {
  components: { Navbar },
  data() {
    return {
      // 轮播图数据
      banners: [],
      // 前台分类列表
      categorymutli: [],
      // 人气推荐
      hotMutli: [],
      // 新鲜好物
      homeNew: [],
      // 猜你喜欢
      goodsGuessLike: [],

      // 控制scroll-view 开启和关闭下拉状态
      refresherTriggered: false,
    };
  },
  onLoad() {
    this.getHomeBanner();
    this.getHomeCategoryMutli()
    this.getHomeHotMutli()
    this.getHomeNew()
    // 因为后期做分页加载，反复调用这个接口 ， 传递参数 page =1 ,page=2
    // 将接口参数设置为全局变量 仅仅是方便我在js中充当一个全局变量， 和 页面渲染，不能直接获取 GuessPrams 来渲染 无效
    this.GuessParams = {
      page: 1,
      pageSize: 10,
    };
    // 添加一个  猜你喜欢 请求的 开关
    this.isLoadding = false;
    this.getHomeGoodsGuessLike()
  },
  methods: {
    // 首页-广告区域-小程序
    async getHomeBanner() {
      const res = await getHomeBanner();
      // console.log(res);
      this.banners = res.result;
    },
    // 前台分类
    async getHomeCategoryMutli() {
      const res = await getHomeCategoryMutli();
      console.log(res);
      this.categorymutli = res.result;
    },
    // 人气推荐
    async getHomeHotMutli() {
      const res = await getHomeHotMutli();
      // console.log(res);
      this.hotMutli = res.result;
    },
    // 新鲜好物
    async getHomeNew() {
      const res = await getHomeNew()
      // console.log(82, res);
      this.homeNew = res.result
    },
    async getHomeGoodsGuessLike() {
      const res = await getHomeGoodsGuessLike()
      console.log(res);
      this.goodsGuessLike = [...this.goodsGuessLike, ...res.result.items]; // 修改为 数组追加
      // 全局变量 总页数
      this.GuessPages = res.result.pages;
    },
    // scroll-view 滚动到底部触发 分页加载
    async scrolltolower() {
      if (!this.isLoadding && this.GuessParams.page < this.GuessPages) {
        this.isLoadding = true;
        // 还有下一页数据
        this.GuessParams.page++;
        await this.getHomeGoodsGuessLike(); // 异步代码
        // 请求完成了 数据渲染完毕
        this.isLoadding = false;
      }
    },
    // 下拉时触发的事件
    async refresherrefresh() {
      this.refresherTriggered = true; // 开启下拉状态

      // // 清空数据
      this.banners = [],
        this.categorymutli = [],
        this.hotMutli = [],
        this.homeNew = [],
        this.goodsGuessLike = [],
        this.GuessParams.page = 1;
      this.GuessPages = 1;
      this.isLoadding = false;
      // // 重新加载,全部请求回来再执行后面的代码
      await Promise.all([
        this.getHomeBanner(),
        this.getHomeCategoryMutli(),
        this.getHomeHotMutli(),
        this.getHomeNew(),
        this.getHomeGoodsGuessLike(),
      ])
      // 模拟 数据都请求回来
      this.refresherTriggered = false;
    },
  },
};
</script>

<style lang="scss" scoped>
.content {
  height: 100vh;
  display: flex;
  flex-direction: column;
}

.main {
  flex: 1;
  overflow: hidden;
  background-color: #f7f7f8;
}

/* 公共面板 */
.panel {
  margin: 20rpx 20rpx 0;
  border-radius: 10rpx;
  background-color: #fff;

  .title {
    display: flex;
    align-items: center;
    padding: 24rpx 24rpx 0;
    font-size: 32rpx;
    color: #262626;
    position: relative;

    text {
      font-size: 24rpx;
      color: #7f7f7f;
      margin-left: 18rpx;
    }
  }

  .more {
    position: absolute;
    right: 24rpx;
    font-size: 26rpx;
    color: #7f7f7f;
  }

  .cards {
    display: flex;
  }

  .name {
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
  }
}

/* 推荐专区 */
.recommend {
  display: flex;
  flex-wrap: wrap;

  .item {
    display: flex;
    flex-direction: column;
    width: 50%;
    height: 254rpx;
    border-right: 1rpx solid #eee;
    border-top: 1rpx solid #eee;

    &:nth-child(2n) {
      border-right: 0 none;
    }

    &:nth-child(-n + 2) {
      border-top: 0 none;
    }
  }

  .cards {
    flex: 1;
    padding: 15rpx 20rpx;
    justify-content: space-between;

    image {
      width: 48%;
    }
  }
}

/* 新鲜好物 */
.fresh {
  min-height: 320rpx;

  .price {
    line-height: 1;
    text-align: left;
    font-size: 26rpx;
    color: #cf4444;
  }

  .small {
    font-size: 80%;
  }
}

.fresh .cards navigator,
.brands .cards navigator {
  width: 25%;
  padding: 15rpx 20rpx 20rpx;
  line-height: 1;
  text-align: center;
}

.fresh image,
.brands image {
  width: 126rpx;
  height: 126rpx;
}

.fresh .name,
.brands .name {
  margin: 20rpx 0 16rpx;
  font-size: 24rpx;
  color: #262626;
}

.brands {
  .price {
    font-size: 24rpx;
    color: #999;
  }
}
</style>
